Legal deadlines in Portugal: prescription periods you should know

In short: In Portugal, a legal right does not last forever. The Código Civil sets an ordinary prescription period of 20 years (art. 309), but layers many shorter ones on top: 5 years for rent, interest and other recurring payments (art. 310), and short presumptive periods of 2 years and 6 months for professionals, merchants and hospitality (arts. 316–317). The clock generally starts the moment the right can be exercised (art. 306), and it can be paused or reset. Miss the deadline and an otherwise valid claim can become unenforceable. CourtStairs answers Portuguese and EU legal questions like this in plain language, with citations to the Diário da República you can check yourself.

Deadlines are where good claims quietly die. In Portuguese civil law the governing concept is prescrição (prescription, or limitation), set out in articles 300 to 327 of the Código Civil. This post explains the ordinary period, the short periods, when the clock starts, and how it can stop or restart — in plain English, for expats, foreigners and Portuguese readers who search in English.

What does "prescrição" actually do to a debt?

Prescription gives the other side a defence — it does not erase the debt or delete the right. Once the period has run, the person who benefits can lawfully refuse to perform (art. 304), but the obligation still legally exists. Two consequences follow that surprise people:

• You must raise it. A court will not apply prescription on its own initiative. It has to be invoked by the party who benefits from it (art. 303). If a defendant never pleads it, the claim proceeds as if the deadline had never passed.
• Prescrição is not caducidade. Caducidade (a separate time-bar) works differently: it typically cannot be interrupted and, in some matters, the court can consider it by itself. Many statutory deadlines you meet — in consumer, tax or administrative contexts — are caducidade, not prescription. Identify which regime applies before you rely on any rule below.

For a worked example of these rules applied to unpaid invoices and consumer debts, see our companion guide, How debt prescription works in Portugal.

What is the general deadline vs the short deadlines in Portugal?

The ordinary prescription period is 20 years (art. 309), but most real disputes are governed by a much shorter special period — 5 years for recurring payments (art. 310) and 2 years or 6 months for everyday professional and hospitality bills (arts. 316–317).

The 20-year rule is the default — it applies whenever the Código Civil, or another statute, has not set a shorter one. Because it is so long, most claims that reach a real dispute are governed by one of the shorter periods instead.

The most important short period is the five-year rule of art. 310. It covers obligations that repeat over time, where letting years of arrears pile up would be unfair: agreed or legal interest, rents (rendas e alugueres), alimony instalments already due, company dividends, and capital-amortisation instalments paid together with interest.

Then come the presumptive prescriptions (prescrições presuntivas) of arts. 316 and 317, with periods of six months and two years. These rest on a different idea: the law presumes the debt was already paid, because these are everyday bills that people do not keep receipts for indefinitely.

When does the prescription clock start running?

The prescription clock starts when the right can first be exercised — normally the day the debt falls due (art. 306), not when the contract was signed or the problem happened. Two refinements matter often:

• If the debtor is only bound to perform a set time after being notified, the clock starts only once that time has elapsed.
• For rights under a suspensive condition or an initial term, the clock starts only when the condition occurs or the term arrives.

So the starting point is not "when the contract was signed" or "when the problem happened," but when you could first have demanded payment or performance. Getting this date right is half the battle, because everything downstream is measured from it.

1. Right becomes exercisableThe clock starts — usually when the debt falls due (art. 306).
2. Time runsThe applicable period elapses day by day: 20, 5, 2 years, or 6 months.
3. Suspension (optional)In defined situations the clock pauses, then resumes where it left off.
4. Interruption (optional)A qualifying act — above all a court summons — resets the clock to zero (art. 323).
5. Period completeThe debtor can invoke prescription and lawfully refuse to perform (arts. 303–304).

Can a deadline be paused or reset in Portugal?

Yes — prescription can be suspended (the clock pauses, then resumes) or interrupted (the time already run is wiped out and a fresh period begins). These two mechanisms change the arithmetic, and they are not the same thing.

Suspension pauses the running of time in specific circumstances the Code defines, after which the clock resumes from where it stopped — the time already elapsed is not lost, but nor does it double-count.

Interruption is more powerful: it wipes out the time already run and starts a fresh period. The most reliable way to interrupt is formal legal action. Under art. 323, prescription is interrupted by the court summons or judicial notification of any act expressing the intention to exercise the right — whatever the type of proceeding, and even if the court turns out to be the wrong one. There is a practical safeguard: if the summons is not served within five days of being requested, for reasons not attributable to the claimant, prescription counts as interrupted once those five days pass. Later annulment of the summons does not undo the interruption.

Which claims have their own deadlines outside the Civil Code?

Many claims run on their own timetables, so the Código Civil is the backbone but not the whole story. Labour claims under the Código do Trabalho, road-traffic liability, tax, and consumer guarantees each have specific deadlines — and Portugal, as an EU Member State, applies EU rules alongside national law in areas like consumer protection and cross-border claims. When your question touches one of those areas, check the special statute first; the Civil Code fills the gaps it leaves. If your dispute is a low-value civil claim, it may belong in a Julgado de Paz small-claims court, which has its own procedure and deadlines.

Where CourtStairs fits

This is exactly the kind of question CourtStairs is built for: it gives a plain-language answer and links each point to the article of the Código Civil — art. 309 for the ordinary rule, 310 for recurring payments, 316–317 for the short presumptive periods, 306 for the starting date, 323 for interruption — so you can open the Diário da República and read the provision yourself. It works in English and Portuguese and has a free tier.

This is general information about the law, not legal advice. Deadlines turn on the exact type of claim and its start date, special regimes abound, and the law changes, so confirm anything important against the primary source or a lawyer before you act.